guccijon

so my headunit display always starts glitching but everything works fine. i was looking into getting a double din unit. i was only looking to spend under 300 and found a couple that i was about to buy but got sceptical. im not looking to replace all my component speakers or spend any extra on installing it. these were the two i found.

Boss BV9560B
DP Video dbd805

does anyone know any other ones in this price range that arent too bad of quality?
will i need to replace my factory amp and or speakers if i buy this?